How does the Enhanced Login Security feature work?
When you choose to set up the extra security protection on your computer, it places a secure cookie in your browser so the next time you log in from that computer, the system recognizes that you are logging in from a trusted location, and it grants you access without any additional information. When you log in from a computer without the extra protection, the system will recognize that and prompt you to answer your challenge question, to which only you should know the answer. If your answer is correct, access will be granted.